This reminds me of this argument with libertarians/ancaps:
A: rich people pay less % in taxes than wage workers, we should close the loopholes
B: but taxes are immoral to begin with
A: ok, but can we do something now about the unequal enforcement? Unrealized gains, tax havens, trusts, fake charities, etc?
B: well a society based on property rights… ackhully you should read this book by Mises/Rothbard/Rand